Examine source code of rpc4SoundCloud

{
  "manifest_version": 3,
  "name": "rpc4SoundCloud",
  "version": "1.0.2",
  "description": "Reads what's playing on SoundCloud and forwards it to a local relay for Discord Rich Presence.",
  "host_permissions": [
    "*://soundcloud.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://soundcloud.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rpc4soundcloud@loren-wastaken.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}